ATI CFO reports tax withholding on vested RSUs

Foster James Robert reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Foster James Robert reported acquisition or exercise transactions in this Form 4 filing.

ATI Inc senior vice president of finance and CFO James Robert Foster reported a small tax-related share transaction. On July 1, 2026, 163 shares of common stock were used to satisfy taxes due on restricted stock units that vested on that date, based on an average trading price of $193.82 per share. After this event, he directly held 57,824 shares of ATI common stock, reflecting a routine compensation and tax-settlement adjustment rather than an open-market trade.

Insider Trade Summary

Exercise: 163 shares

Exercise 1 txn

Insider Foster James Robert

Role SVP, Finance and CFO

Type	Security	Shares	Price	Value
Exercise	Common Stock, par value $0.10 per share	163	$193.82	$32K

Holdings After Transaction: Common Stock, par value $0.10 per share — 57,824 shares (Direct)

Footnotes (2)

1. F1. Shares withheld for payment of taxes on restricted stock units that vested by their terms on July 1, 2026.
2. F2. Represents the average of the high and low trading prices for one share of the Issuer's Common Stock on the New York Stock Exchange on July 1, 2026.

Key Figures

Shares used for tax withholding: 163 shares Tax valuation price: $193.82 per share Shares held after transaction: 57,824 shares

3 metrics

Shares used for tax withholding 163 shares Restricted stock units vested on July 1, 2026

Tax valuation price $193.82 per share Average of high and low NYSE prices on July 1, 2026

Shares held after transaction 57,824 shares Direct ATI common stock holdings post July 1, 2026 event

Key Terms

restricted stock units, withheld for payment of taxes, average of the high and low trading prices

3 terms

restricted stock units financial

"Shares withheld for payment of taxes on restricted stock units that vested by their terms on July 1, 2026"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

withheld for payment of taxes financial

"Shares withheld for payment of taxes on restricted stock units that vested by their terms on July 1, 2026"

average of the high and low trading prices financial

"Represents the average of the high and low trading prices for one share of the Issuer's Common Stock on the New York Stock Exchange on July 1, 2026"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did ATI (ATI) CFO James Robert Foster report?

ATI CFO James Robert Foster reported a routine tax-related share transaction. 163 common shares were applied to cover taxes on restricted stock units that vested on July 1, 2026, with no open-market purchase or sale involved in this filing.

How many ATI (ATI) shares were involved in the CFO’s July 1, 2026 transaction?

The transaction involved 163 ATI common shares. These shares were withheld to pay taxes on restricted stock units that vested by their terms on July 1, 2026, rather than being bought or sold on the open market as a discretionary trade.

At what price were the ATI (ATI) shares valued for the CFO’s tax withholding?

The 163 shares were valued at $193.82 per share. This figure represents the average of the high and low trading prices for ATI common stock on the New York Stock Exchange on July 1, 2026, as used for the tax-settlement calculation.

How many ATI (ATI) shares does the CFO hold after this reported transaction?

Following the July 1, 2026 tax-related transaction, ATI’s CFO directly held 57,824 common shares. This position reflects his remaining equity stake after applying 163 shares toward tax obligations related to the vesting of previously granted restricted stock units.

Does the ATI (ATI) CFO’s reported transaction indicate an open-market buy or sell?

The reported transaction does not indicate an open-market buy or sell. The 163 shares were withheld solely to satisfy tax obligations on vested restricted stock units, making this a routine compensation-related adjustment rather than a discretionary trading decision in ATI stock.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 07/06/2026 - 04:54 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Foster James Robert

(Last) (First) (Middle)

C/O ATI INC.

2021 MCKINNEY AVENUE

(Street)

DALLAS TEXAS 75201

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ATI INC [ ATI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Finance and CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.10 per share	07/01/2026		M		163(1)	D	$193.82(2)	57,824	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares withheld for payment of taxes on restricted stock units that vested by their terms on July 1, 2026.

2. Represents the average of the high and low trading prices for one share of the Issuer's Common Stock on the New York Stock Exchange on July 1, 2026.

	/s/ Amanda J. Skov, Attorney-in-Fact for James Robert Foster	07/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)